Piano pin



FIG. 1 is a front perspective view of a piano pin showing my new design;

FIG. 2 is a rear perspective view of the piano pin shown in FIG. 1;

FIG. 3 is a left side view of the piano pin shown in FIG. 1;

FIG. 4 is a right side view of the piano pin shown in FIG. 1;

FIG. 5 is a front perspective view of a piano pin showing a second embodiment of my new design;

FIG. 6 is a rear perspective view of the piano pin shown in FIG. 5;

FIG. 7 is a left side view of the piano pin shown in FIG. 5; and,

FIG. 8 is a right side view of the piano pin shown in FIG. 5. 

The ornamental design for a piano pin, as shown. 